MARC 主機 00000nam  2200385   4500 
001    AAI3427223 
005    20111021124338.5 
008    111021s2010    ||||||||||||||||| ||eng d 
020    9781124309262 
035    (UMI)AAI3427223 
040    UMI|cUMI 
100 1  Obielodan, John Olorunshola 
245 10 Fabrication of multi-material structures using ultrasonic 
       consolidation and laser-engineered net shaping 
300    216 p 
500    Source: Dissertation Abstracts International, Volume: 71-
       12, Section: B, page: 7675 
500    Adviser: Brent E. Stucker 
502    Thesis (Ph.D.)--Utah State University, 2010 
520    This research explores the use of two additive 
       manufacturing processes for the fabrication of multi-
       material structures. Ultrasonic consolidation (UC) and 
       laser-engineered net shaping (LENS) processes were used 
       for parallel systematic investigations of the process 
       parameters and methodologies for the development of multi-
       material structures 
520    The UC process uses ultrasonic energy at low temperature 
       to bond metallic foils. A wide range of metallic materials
       including nickel; titanium; copper; molybdenum; tantalum; 
       MetPregRTM; silver; stainless steel; and aluminum alloys 
       1100, 3003, and 6061 were bonded in different 
       combinations. Material domains are inherently discrete in 
       ultrasonically consolidated structures. The mechanical 
       properties of some of the bonded structures were 
       characterized to lay the groundwork for their real-life 
520    LENS uses a laser beam to deposit metallic powder 
       materials for the fabrication of fully dense structures. 
       Mechanical testing was used to characterize the flexural 
       and tensile properties of dual-material structures made of
       Ti6Al4V/10wt%TiC composite and Ti6Al4V materials. 
       Experimental results show that the strength of transition 
       joints in multi-material structures significantly depends 
       on the joint design 
520    Dual-material minimum weight structures, representing 
       geometrically and materially complex structures, were 
       fabricated using the results of the process parameters and
       fabrication methodologies developed in this work. The 
       structures performed well under loading test conditions. 
       It shows that function-specific multi-material structures 
       ultrasonically consolidated and LENS fabricated can 
       perform well in real-life applications 
590    School code: 0241 
650  4 Engineering, Mechanical 
690    0548 
710 2  Utah State University.|bMechanical and Aerospace 
773 0  |tDissertation Abstracts International|g71-12B 
856 40 |u